Improvement in geinding-mills



J. M. MILLER.

Feed Regulator. No. 60,404. Pafentgd Dec. 11,1866.

ILFEIERS, PHOTO-LITHQGRAPMgR, WASHINGTON D C goiter tam gaunt ffirr.

IMPROVEMENT IN GRINDING-MILLS.

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TO ALL WHOM IT MAY- CONCERN:

Be it known that I, JOHN M. MILLER, of Hamilton, in the county of Butler, and Stateof Ohio, have invented,

a new and useful Improvement in Grinding-Mills; and I do hereby declare that the "following is a full, clear,

and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 represents a vertical central section of this invention, theline we, fig. 2, indicating the plane of I the section.

Figure 2 is a longitudinal section of the same, taken in the plane indicated by the line y y, figL-l.

Similar letters of reference indicate like parts This invention consists in the arrangement of a suction-blower in combination with the case inclosing the mill-stones of a grinding-mill, and with a suitable receiver, in such a manner that by the action of said suctionblower the dust, flour, vapor, and hot aircreated by the action of the grinders are removed and the grinders are 1 enabled to work free and without danger of heating. Suitableslids in the case serve to regulate the power ofthe draught created by the suction-blower and the receiving-box, into which the dust, vapor, &c., are driven, is provided with an escape-opening for the wind.

A represents the lower floor of a mill, from which rise columns'B, which support the upper floor, G. D is the runner, which is inclosed in, the case E, and to which the material to be groundis fed through the hopper, F. From the case E rises a tube, G, which connects with the case H, which incloses thesuction-blower I. By this arrangement the dust, vapor, and hot airilcreated by the action of the runner are: sucked up through the tubeG, and they are discharged from the case H throughthe' spout J into thereceiving-box K. This box is placed in any convenient spot in the mill, and it is firmly closed, with the exception of an aperture a in the side or end through which the wind escapes. The case E is provided with a regulating-slide b, which servcs to reg ulate the force of the suction. If this slide is open or partially open the efl'ect of the suction-blower on the runner is diminished, but if said slide is completely closed the suction-blower acts with its full force on the air and dust contained in the case E, and the most powerful efi'ect is produced. By this device all impurities can be remo ved f I,

from the case so as to prevent the same from lodging on the hoops or in the case, orin'some other part of the apparatus; and, furthermore, the heating of the stones and; the burning of the flour is prevented, the operation of bolting the flour is facilitated, and a better and more durable flour is produced than with grinding-mills of I the ordinary construction. If desired, one and the same suction-blower can be connected with two ormore pair of grinders, but in this case the size of the blower and the capacity of the receiving-box have to be increased accordingly. V r v Having thus described my invention, what I claim asn ew, and desire to secure by Letters Patent, is-

The arrangement of the tube Gr, blower, case H, and receiving-box K, in combination with the case proi vided with the regulating-slide 5, operating substantially as and for the purpose describeds' The above specification of my invention, signed by me this day'of 1866.

J M. MILLER.

Witnesses:

J 01m BAcnmANN, Ace. SOELMER. 

